State return

Am I legally obligated to file a state return if I have a W2 that says I was paid wages and had taxes withheld for that state? I ask because TT charges $45 for each state return beyond the one that comes with the Home & Business download. So, if I'm getting less than $45 from these non resident states, it doesn't make economic sense to even file a return. Of course, one is never sure how much one will get until one does the return. One state is refunding $15 and another $30.